How to update a field in an array nested in another array in mongodb

1

data structure in messages

board:"general" 
thread:[ {_id:"a",  
      replies: [{_id:"b", reported:false},
                {_id:"c", reported:false},
                {_id:"d", reported:false}
] }]

I want to update a reported filed in replies

I used this: (board, thread_id, reply_id) all declared:

messages.updateOne({
board,
"thread._id":thread_id, 
"thread.replies._id":reply_id}, 
 {$set:{"thread.replies.$.reported":true}},  (err, data)=>{
console.log(data) 
}  )

My query matches the document but does not update it. And console returns undefined
If I use this to update:

{$set: {"replies.$.reported":true}

it’s updating the parent document outside the both array
like this:

board:"general"
thread:[]
replies:[{reported:true}] // another field inserted here

I’ve tried few other method of update, but did not work.

Can you give me a simple solution for this?

Thank you.

2